The EMA8H3043P20I30D from ECHO Microwave is a Band Pass Filter with Frequency 3.03 to 3.05 GHz, Insertion Loss 4.5 dB, Rejection 30 to 60 dB, Return Loss 15 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for EMA8H3043P20I30D can be seen below.